3 Material Balance - Media FilterUsed to prevent reverse osmosis membrane from fouling by removing large percentage of suspended solid from feed waterSDI measurement commonly used to indicate the effectiveness of media filterAlmost, all RO membrane manufacture recommends SDI to be less than 3

14 Material Balance - NaOHAdded for pH adjustment to minimize the corrosion in the product water pipesThe required pH for drinking and potable water is in the range of 6.5 – 9.5The calculation was based onNeutralization of acidAdjust pH from 7 to 8

25 Actions 3. Products Mix brine with seawater before discharge.RO plantFeed seawaterTo seawaterMix brine with seawater before discharge.2) More than one discharge.These are located a way of each other at a distance.3) Mixing brine water with cooling water coming from adjacent power plant.4) Evaporation ponds5) Deep well disposal